Bubble nucleation and quantum initial conditions in classical statistical simulations
Abstract
Classicalstatistical lattice simulations provide a useful approximation to outofequilibrium quantum field theory, but only for systems exhibiting large occupation numbers, and only for phenomena that are not intrinsically quantum mechanical in nature. In certain special circumstances, it can be appropriate to initialize such realtime simulations with quantumlike zeropoint fluctuations. We will revisit these points, and investigate reports that quantum bubble nucleation rates in 1+1 dimensions can be computed through the classical evolution of such a quantumlike initial condition. We find that although intriguing, the reported numerical agreement between classicalstatistical simulations and the quantum nucleation rate in 1+1 dimensions is a coincidence, which is not specific to this choice of initialisation, is parameter and lattice cutoff dependent and disappears as the number of spacedimensions increases from 1+1 to 2+1
 Publication:

arXiv eprints
 Pub Date:
 June 2022
 arXiv:
 arXiv:2206.08691
 Bibcode:
 2022arXiv220608691T
 Keywords:

 High Energy Physics  Lattice;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 27 pages, 19 figures